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Want our zinc phosphating to be orange-red

I want to achieve orange red hue on the zinc phosphated Mild Steel part.
Sometimes it happens while I am doing the coating, but have no idea what causes it. But most of the time it doesn't. I wash the part with a alkaline solution then two water rinses and then phosphating solution at room temperature, solution contains an activator. lastly a water rinse and forced dry.

G S ARORA
BUYER - DELHI
May 31, 2009

Dear Mr.ARORA,What you want whether the rust finish or zinc copper phosphating? Please specify.

GULSHAN SACHDEVA
- Moradabad, Uttar Pradesh, India
June 4, 2009

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